A photo posted by rondarousey (@rondarousey) on Feb 18, 2016 at 9:19pm PST

UFC fighter Ronda Rousey apologized to her fans for unknowingly promoting a photoshopped photo of her appearance on "The Tonight Show," Today reported.

In the photo, Rousey's arms were altered to appear smaller than they really are. Rousey posted the original photo next to the altered photo on Instragram, where she made the apology for promoting a misleading photo that was taken on Feb. 17 during her guest appearance on the NBC Universal-owned show.

"I have to make an apology," read the caption Rousey posted with the side-by-side photo. "I was sent a picture to share on social for [Jimmy] Fallon that was altered without me knowing to make my arms look smaller."

She continued, "I am extremely proud of every inch of my body… I can assure you all it will never happen again. I could not be more appalled and hope you all forgive me."